Multiple patterns of diblock copolymer confined in irregular geometries with soft surface

doi:10.1088/1674-1056/24/12/126403

中国物理B ›› 2015, Vol. 24 ›› Issue (12): 126403-126403.doi: 10.1088/1674-1056/24/12/126403

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇下一篇

Multiple patterns of diblock copolymer confined in irregular geometries with soft surface

李颖, 孙敏娜, 张进军, 潘俊星, 郭宇琦, 王宝凤, 武海顺

School of Chemistry and Materials Science, Shanxi Normal University, Linfen 041004, China

收稿日期:2015-06-02 修回日期:2015-08-06 出版日期:2015-12-05 发布日期:2015-12-05
通讯作者: Zhang Jin-Jun E-mail:zhangjinjun@sxnu.edu.cn
基金资助:
Project supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20121404110004), the Research Foundation for Excellent Talents of Shanxi Provincial Department of Human Resources and Social Security, China, and the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi Province, China.

Multiple patterns of diblock copolymer confined in irregular geometries with soft surface

Li Ying (李颖), Sun Min-Na (孙敏娜), Zhang Jin-Jun (张进军), Pan Jun-Xing (潘俊星), Guo Yu-Qi (郭宇琦), Wang Bao-Feng (王宝凤), Wu Hai-Shun (武海顺)

School of Chemistry and Materials Science, Shanxi Normal University, Linfen 041004, China

Received:2015-06-02 Revised:2015-08-06 Online:2015-12-05 Published:2015-12-05
Contact: Zhang Jin-Jun E-mail:zhangjinjun@sxnu.edu.cn
Supported by:
Project supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20121404110004), the Research Foundation for Excellent Talents of Shanxi Provincial Department of Human Resources and Social Security, China, and the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi Province, China.

摘要/Abstract

摘要： The different confinement shapes can induce the formation of various interesting and novel morphologies, which might inspire potential applications of materials. In this paper, we study the directed self-assembly of diblock copolymer confined in irregular geometries with a soft surface by using self-consistent field theory. Two types of confinement geometries are considered, namely, one is the concave pore with one groove and the other is the concave pore with two grooves. We obtain more novel and different structures which could not be produced in other two-dimensional (2D) confinements. Comparing these new structures with those obtained in regular square confinement, we find that the range of ordered lamellae is enlarged and the range of disordered structure is narrowed down under the concave pore confinement. We also compare the different structures obtained under the two types of confinement geometries, the results show that the effect of confinement would increase, which might induce the diblock copolymer to form novel structures. We construct the phase diagram as a function of the fraction of B block and the ratio of h/L of the groove. The simulation reveals that the wetting effect of brushes and the shape of confinement geometries play important roles in determining the morphologies of the system. Our results improve the applications in the directed self-assembly of diblock copolymer for fabricating the irregular structures.

关键词: self-assembly, irregular geometries, soft confinement, self-consistent field

Abstract: The different confinement shapes can induce the formation of various interesting and novel morphologies, which might inspire potential applications of materials. In this paper, we study the directed self-assembly of diblock copolymer confined in irregular geometries with a soft surface by using self-consistent field theory. Two types of confinement geometries are considered, namely, one is the concave pore with one groove and the other is the concave pore with two grooves. We obtain more novel and different structures which could not be produced in other two-dimensional (2D) confinements. Comparing these new structures with those obtained in regular square confinement, we find that the range of ordered lamellae is enlarged and the range of disordered structure is narrowed down under the concave pore confinement. We also compare the different structures obtained under the two types of confinement geometries, the results show that the effect of confinement would increase, which might induce the diblock copolymer to form novel structures. We construct the phase diagram as a function of the fraction of B block and the ratio of h/L of the groove. The simulation reveals that the wetting effect of brushes and the shape of confinement geometries play important roles in determining the morphologies of the system. Our results improve the applications in the directed self-assembly of diblock copolymer for fabricating the irregular structures.

Key words: self-assembly, irregular geometries, soft confinement, self-consistent field

中图分类号: (Phase separation and segregation in model systems (hard spheres, Lennard-Jones, etc.))

64.75.Gh

64.75.Yz (Self-assembly) 64.70.km (Polymers)

李颖, 孙敏娜, 张进军, 潘俊星, 郭宇琦, 王宝凤, 武海顺. Multiple patterns of diblock copolymer confined in irregular geometries with soft surface[J]. 中国物理B, 2015, 24(12): 126403-126403.

Li Ying (李颖), Sun Min-Na (孙敏娜), Zhang Jin-Jun (张进军), Pan Jun-Xing (潘俊星), Guo Yu-Qi (郭宇琦), Wang Bao-Feng (王宝凤), Wu Hai-Shun (武海顺). Multiple patterns of diblock copolymer confined in irregular geometries with soft surface[J]. Chin. Phys. B, 2015, 24(12): 126403-126403.

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Multiple patterns of diblock copolymer confined in irregular geometries with soft surface

Multiple patterns of diblock copolymer confined in irregular geometries with soft surface

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